NV2 PtMP - good signal and ccq but low throughput

RouterOS Wireless Networking
1

Hello,

This is my setup:
AP: 433AH, R52nM and parabolic 90cm dish 32dbi antenna, 5GHz-only-N, 20/40 eC, nv2 wireless protocol, one chain,
Client 1: 433AH, R52nM and parabolic 90cm dish 32dbi antenna (17km distance in winbox) - signal Tx/Rx: -65/-65, ccq Tx/Rx: 70/90%, SNR:50db, Rates: 135Mbps-40Mhz/1S/SGI
Client 2: 433AH, R52nM and parabolic 90cm dish 32dbi antenna (19km distance in winbox) - signal Tx/Rx: -68/-66, ccq Tx/Rx: 70/85%, SNR:50db, Rates: 120Mbps-40Mhz/1S/SGI

with those signal levels and ccq i expected more throughput then using old 802.11a turbo mode where i had constant 40-50Mpbs TCP measured in bandwidth test, now i have 30-60Mbps which changes rapidly. I suspect that my nv2 settings, which was default (2ms, 40km, 50% dynamic downlink), is bad so i changed it. I tried to lower cell radius to 25km, tried higher radius to 50km, tried TDMA timing from 1ms to 10ms but each settings didn’t give satisfy result, worst result was on auto. I also tried 802.11n but then bandwidth test shows just 10Mbps TCP??! Now i set 3ms and 30km, downlink is on 60% where i am getting 30-40Mbps stable but problem is when i am pinging client 2 from client 1 or vice versa, there are too many timeouts, sometimes Winbox won’t access client 1 or keeps disconnecting form client 2 etc.

Can you help me to make those links more stable and gain more bandwidth with this setup?
Thanks

2

Anyone? :frowning:

3

Your CCQ rates are not good, and what do you think you get with 1 Chain?

4

Well, i expected more. On 135Mpbs rate it should be 60Mbps stable with those signal levels and ccq.

5

135 Mpbs is max Brutto, its WiFi, with an old 54Mbit 802.11a you got about 20Mbit
And your CCQ shows that your spectrum is not clear…

6

Your equipment is completely old. Old chipset = small speed

7

is the 70% CCQ with traffic? if not what is it with traffic? do a btest within your network from the client cpe and watch the CCQ. 70% is not good, needs to be nearer 90%, if if drops further under load then its definately a noise or fresnal issue. And like previous poster said, the old 433 board is not really a good choice here. Make sure MT ver is latest and the RB firmware.